300²µ/10½´Ç³ú onion, finely chopped
a few sprigs of rosemary, 6cm/2½in long
salt and freshly ground black pepper
100²µ/3½´Ç³ú fresh breadcrumbs
2 tbsp olive oil
5 tbsp extra virgin olive oil
300ml/10½fl oz vegetable stock
100²µ/3½´Ç³ú freshly grated parmesan or pecorino cheese
2kg/4lb 6½oz leg of spring lamb
100²µ/3½´Ç³ú pancetta, cut into tiny cubes
200g/7oz prosciutto (such as parma ham), cut into strips 5mm/¼in thick and 6cm/2½in long
500g/1lb 1½oz fresh peas, shelled weight, or 500g/1lb 1½oz frozen petits pois
1½ glasses of white wine